But he doubted Amanda’s claims that her sexy image was only down to healthy eating, yoga, and a new stylist.

“Amanda led the way in the gorging with the same ravenous fervour as when Tom Hanks ate his first meal on return from the desert island in Castaway ”

Piers Morgan

He said: “Knowing the little minx as well as I do, there had to be more to it than that.”

The pair went for a slap-up meal at a swanky Italian restaurant in Surrey, along with sports presenter Jake Humphrey, 35. And after five hours of munching and guzzling champagne Piers, 49, came up with a theory about his pal’s look.

He said: “Amanda led the way in the gorging with the same ravenous fervour as when Tom Hanks ate his first meal on return from the desert island in Castaway.

“I detected signs of a woman who hadn’t eaten a morsel of food in the five-month duration of BGT’s filming schedule.

“Or, as we call it in the trade, the ‘Don’t Want To Be Culled By Cowell’ diet”.